The nLight nCM ADC(X) Series photocell sensor provides both on/off and automatic dimming control for daylight harvesting applications. Ideal for spaces with windows, such as vestibules, corridors, classrooms, or offices, the sensor works by monitoring daylight conditions in a room, then controlling the lighting so as to ensure that adequate lighting levels are maintained. The nCM ADCX communicates with remote nLight switching and/or dimming devices (e.g. nIOD, nIO LEDG, nIO EZ, nPP16 D, and nPANEL) to automatically adjust a zones lighting levels. The nCM ADC can communicate with remote devices as well as control the dimming level of any directly wired 0-10 VDC dimmable driver or ballast through its integrated output. The nCM ADC(X) can be used alone in a zone or together with occupancy sensors.